.none{
    display: none;
}

#main .upload p > em {
    margin-left: 100px;
    color: darkred;
    font-size: 12px;
    display: none;
}
.noNull,.noLength{
    display: none;
}
#main .upload p > em.zwf{
    display: block;
    height: 16px;
}
#main .upload p.zyms{
    padding-top: 0px;
}
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
}
.loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}